I joined an Italian beginners group a few months ago which is also going well, we meet fortnightly online
And just before Christmas I volunteered to help another group who were struggling - I felt I had some skills that could help them. We meet online fortnightly too.
If you haven't tried U3A, do google it - I guarantee there will be a branch local to you - & locally as well as nationally there are lots of things still going on.
Also check out Futurelearn, online education short courses. Vast variety of topics including history, science, culture, languages, family history, health, psychology + career development. They are led by university tutors. Some are introduction to topics. The basic ones take up 2-4 hours per week (whenever it suits) and last around 6 weeks.
A woman in my neighbourhood has this week set up a "self-led" Covid-safe walk & talk group in the park for people who are feeling isolated. People who want to take part (or someone on their behalf) join a new closed Facebook group. I'm thinking of joining. I think the plan is to walk in pairs. Main path is wide; can go single file on narrow paths and step off onto grass if needed.
RSPB Big Birdwatch is at end of January. I've done it at home and in park depending on weather. I do nature-spotting throughout year in garden, park and on walks. May be different birds around due to freeze. Findings can be sent to organisations for their records, e.g. 1st bumblebee or butterfly seen each year.